Coupling-knuckle reinforcement.



.IANNEY @L E. P. KINNE yRAL COUPUNG KNUCKL REINFORCENIENT.

"MF'UCATION l'? DCT. 25, 1912.

Patented Apr. 13, 1915.

2 SHEETS-SHBET 24 knuc le reinforcement.

PMTION 0F NEW lIEHSEY.

Specification of Letters Pe tentt lizillented Agn i3, 'i

To uZZ who-m it may concern Be it known that We, ROBERT E. L JAN-- New,of (lineage, in the enunty of Cool: .ind tete of Illinois, and EDMUND P.K1N Nr., of Alliance, in the county et Stark and State of Ohio, citizensof the United States, have invented certain new und useful improve mentsin CouplerKnuclile ,Reinfomeinentse of Ywhich the following nspeciiieetion.

Ouv. invention relates tu cer couplers zin/.l has articular reference toa nevel coupler The invention more particularly relates to animprovement whereby ineens are previded for reinforcing the usualwearing sur-- faces and relievin the knuckle pivot pin. under pullingund ulmg stresses.

Some of tno objects sought and attained by the present construction areas follows: 1st: Increased strength and length of useful life ofcar/couplers constructed in inmoralanee with our invention underpullingr and hufling stresses. 2nd.: Increased" strength el the knucklein a line passing transversely through the center of the pivot pin hole.3rd: Increase in effective strength mul stillness et the knuckle pivotpin by :relieving it of e pertion of the pulling and bulliinr stressesand yconsequent decrease in the amount Gif 'weer o the piu and thepivot-pin holes beth in the knuckle and in the lugs :if the couplerhead. 4th: increase in tomi aren of surfaces un the knuvlfle und heiniin Contact during buiiing stresses inni by snuli increase to obtain ilgreater (listi'iliutieu o( stresses and refluctin ot distoi'tien, M: Theconstruction of certain oi" the reinoreing surfaces in such manner thatwhen the knuckle is opene the surfaces will not lie in Contact and willtherefore @iler nu tesis-1f ance to the swinging of theulinuekln. l undfurther objects are :iltuineil in :i struction such ns shown in'theaufeminin ing drawings, wherein,

n Figure l is u plan View of :i knuckle cnnstrueted in accordance withour invention; Fig. 2 is n plan View of u coupler lug ranged tointel-lit with the knuckley shown in Figw l; Fig. 3 is a plan 'iew of a(simplen: coupler havin our improvements applied thereto, and, ig. 4 iszi side elevation, piubtially broken away, showing the coupler anziknuckle intertted.

of the (mnu nays er hul; :is uullineil n ille givol, pin www #guai lotlm Pullis@ 1 fr xiii mm1-s mini@ that line A A is normal to surface oof lug L, and that the Width of lug L along this line is considerable,offering a high resista' ce to shearing during pulling stresses.

By refer-rin to Figs. 1 and it will therefore be seen tiat stresses inthe direction ot' line A, A, will be resisted by surfaces u being incontact, and that such stresses will be taken up and distributed by themetal oi' the ears, thus relieving the knuckle pivot pin of the stressestending to bend it in the direction of A, A', and rendering the cou`pier inoperative. Similarly, by referring to Figs. l and 2, it will beseen that stresses in the direction of line B, B', will be resisted bysurfaces e, being in contact. and the sur faces e, are normal to thedirection of line of force B, B, and consequently are in the mosteifective position; also that a dimension ol' lug L is very considerablemeasured along the line of force B, B", Therefore the lug L isparticularly Well adapted to resist the stresses along this line, andsuch stresses will be taken up and distributed through the metal of thecoupler head, thus relieving the knuckle pivot pin of the stressestending to bend it 1n the direction of l B. and renderin the couplerinoperative.

Buihng stresses are further alrsorbcd by surfaces and e, of lugr L ofknuckle conr ing in contact with similar surfaces oi coupler head, andby this added arca ot contact to reduce the rapidity of wear and conseAquent amount of distortion from the designed lines. The stresses arefurther taken up by selecting suchv a. radius d, greatly in excess ofthe normal radius j, (shown in dotted, lines in Fig. l) to describe arec. Normal radius j, to generate an arc describing the boundary of thchub oi the knuckle is of the same length as distance from center ofpivot pin hole O, to point f/ on contour, but radius (l, as will neseen, is considerably greater than radius j, consequently the extent ofsurface Z, and the strength of lug L on the line B, B, also the strengthon line and direction A., A', is greatly increased.

lTransverse strength is gained by adding lug L to the top and bottom hubsurfaces {indicatec at J. Fig. 4.), of the knuckle so that the verticaldistance (see Fig. 4) mer sz id lug is increased by the total width ofthe lugs L. Therefore the strength of the knuckle under pulling stressesthrough a section Y. Y is greatly increased lt has been slal vr. that inservice coupler knuckles br ak very irciniently through this section Y,Yf. and this increased strength will very greatly reduce the failures ofcar couplers from this cause.

Surfaces a of knuckle and head. coming in contact during pullingstresses, offer an additional bearing and wearing area which serve tofurther distribute the stresses and to thus maintain the designedcontour lines and consequently the useful life for a greater period.

Surfaces f of knuckle and coupler head. coming into contact at theextreme limit. ot the outward or opening movement of the knuckle, otl'eradditional striking and bearing area to stop or limit thc opening ot theknuckle. The blow produced by the knuckle striking its stops in openingoutward is thus absorbed and distributed through an irrcreased area ofsurfaces, and thus further insures that the knucklel will not open to apoint beyond that desired.

ty constructing the knuckle and coupler head so that arc a is eccentricwith the pivot pin hole, the knuckle will swing away from and clear ofarc a. of the coupler head during the opening movement and there will beno interference of their surfaces to retard the opening or closing oithe knuckle.

Surface (i, heretofore referred to. assists not only in absorbing shocksduc to hailing but overcomes the tendency of the knuckle to niovc awayfrom the-guard arm under pulling stresses. This explained because of thetendency of the knuckle to rotate around its extreme inner end. which wehave marked G. Under pulling :stress and with a loose pin, the resultant`force in the line A', will force the ,surfaces (l into contact thusrelieving the pin from all strain. lli der builing conditions. ol'course the. fanfares (l will act to absorb a portion ot the stresfwsbecause of the tendency of the knuckle to rotate on the surface s a'further protection against distortion due to bufling stress we haveprox idr-d the flanges M, extending above and below the hub of theknuckle. these flanges being' intended to contact the lug ol' thecoupler when the knuckle is closed. Preferably. the inner surfaces ofthese lugs are struck from a point eccentric to the pivot pin hole.- inorder that they may contact the coupler lugs closely when the knuckle inclosed position and be free when swung outwardly.

le claim: i

1. In a car coupler, the combination of a head having lugs, and aknuckle provided with reinforcements extending above and below the hubthereof, said reinforcements consisting of integral lugs, an outer boundary line c of which x.is located outside of the normal hub contour and aradial boundary' line of which is located outside of a lungi tudinalline/,passed through the pivotal airis of the knuckle, substantially asdescribed.

Q. In a car coupler, the combination oi a head having ears provided withrecesses, a knuckl'e interitting,r with said head and having lugsadapted to eoperate with. the reeesses in said ears, said lugs cxtendini and below the knuckle hub and provi substantial mass of metal outsidethe non mal hub diameterl which .is` intersected by' of the couplerlili? ilnes indicating the resultants of forces applied in pulling orbuiing, substantially as described. v

3. In a car coupler, the combination of a head having ears provided withrecesses, a knuckle, substantially arc-shaped lugs on said knuckleabovev and below the hub thereof, said lugs coperating with the recessesin said ears, the arcuate extremities of said lugs forming stops, landbeing limited by radial lines extending from a point substantiallycoincident with the pivot pin center, the arc extending over more than90 of the hub circumference, substantially as described.

.4. In a car coupler, the combination of a head having ears providedwith recesses, a knuckle interfitting with said head, lugs in saidknuckle extending above and below the knuckle hub and adapted tocoperate with the Arecesses in said ears, said lugs providing asubstantial mass of metal outside of the normal hub diameter, said massof metal being so located as to be intersected by lines passing throughthe pivot pin opening at an angle of @and C respectively from thelongitudinal center line ofthe coupler, substantially as described. 1

' 5. In a car coupler, the combination of a head having ears providedwith recesses,

-.said recesses forming abutments of substan- "j'tial area, a knuckleprovided with integral reinforcing lugs 'above and below the hubthereof, said lugs including a mass of metal outside the normalfhubdiameter, the bounding edges of said lugs being fixed by radial ylines'extending from the axis of the knuckle pivot and constitutingstops of substantial area, said: stops being adapted to contact saidabutments epd relieve the knuckle 'loW the hub thereof, the outlineofthe outer portion of said lugs being formed partl from a radiuslsubstantially coincident Wit the pivot pin center and partly by astraight line tangent to said curved line, and the inner surface of saidlugs being curved on a radius eccentric to the pivot pin center,substantially as described.

8. In a car coupler, the combination of a head having ears provided withrecesses,'

and a knuckle having an arcuate surfaced` -andy a substantially planesurface G .co-

operating with correspondingly shaped stops o n the coupler head wherebyto re? move strain from the pivot pin by counteracting the tendency ofthe knuckle-to rotate about a point at or near the locking face of `theknuckle, substantially as described.

ROBERT E. L. J ANNEY. EDMUND P. KINNE. llfitnesses to signature of R. E.L. J anney:

J. F. CRAMER, F. H. RoHLEs. Witnesses to signature of E. P. Kinne:

LAUNA CARLISLE, CLYDE CorrMANi x

